Re: [lwip-users] Setting NTP server address according to some conditions

[address@hidden]

Am 19.04.2019 um 09:33 schrieb address@hidden:
> Hi!
>
> I’m using LWIP 2.0.3. In my code I have a static  NTP server address.
> But this address can be invalid or valid (depending what the user will
> write in it). If DHCP is enabled I want to reach the following behavior:
>
>   * If the NTP server address is delivered via the DHCP, it will be set
>     and used (it doesn’t matter what is the static address).
>   * If the NTP server address is not delivered via the DHCP and the
>     static NTP server address is invalid, the NTP will not be initialized.
>   * If the NTP server address is not delivered, but the static NTP
>     server address is valid, the NTP will be initialized and will use
>     the static address.
>
> To reach this, I need to decide what to do in the call of the function
> dhcp_set_ntp_address(). But there is no callback, so I cannot call my
> own code. How can I reach this behavior without modifying the original
> code of the stack (file sntp.c)?

This is open source development: post a patch that does what you want in
a portable way and we'll see if it can be added.

Regards,
Simon